1)2 3/7 ×7=17
2 3/7 × 7 = 17/7×7/1=17
2)(2/9 + 1 2/3 ) ×3=2 45/84
1)2/9 + 1 2/3 =1 6/9 + 2/9 = 1 8/9
2)1 8/9 ×3 = 17/9 ×3/1 = 17/3=5 2/3
3)5/12× 2 3/7 + 5/12×3 4/7=2 45/84
1)5/12 × 2 3/7 = 5/12 ×17/7= 85/84= 1 1/84
2)5/12×3 4/7=5/12 ×25/7=125/84=1 41/84
3)1 41/84+1 1/84=2 45/84.
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Х₁=3
х₂=-1
х₁+х=3-1=2
!!!!!!!!!!!!!!
2/5=0,4
45/900=9/180=0,05
0,7
<span>520:1.560=52/156=26/78=13/39
</span>0,5
<span>54:162=9/27=1/3 </span>
Маша - 35г
Миша-?, на 5% меньше
Всего-?
35-(35х5/100)=33,25 округляем 33
35+33=68 грибов всего